648559651 has 2 divisors, whose sum is σ = 648559652. Its totient is φ = 648559650.

The previous prime is 648559633. The next prime is 648559687. The reversal of 648559651 is 156955846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648559651 - 2⁷ = 648559523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 648559595 and 648559604.

It is not a weakly prime, because it can be changed into another prime (648559631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324279825 + 324279826.

It is an arithmetic number, because the mean of its divisors is an integer number (324279826).

Almost surely, 2^648559651 is an apocalyptic number.

648559651 is a deficient number, since it is larger than the sum of its proper divisors (1).

648559651 is an equidigital number, since it uses as much as digits as its factorization.

648559651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 49.

The square root of 648559651 is about 25466.8343340903. The cubic root of 648559651 is about 865.5987928500.

The spelling of 648559651 in words is "six hundred forty-eight million, five hundred fifty-nine thousand, six hundred fifty-one".